Do you think this is because the primary social landscape is online now, and the crucial cues, regarding tastes and allegiances, are coded into the new landscape? In which case, meatspace is left behind as a peripheral/supplemental mode of expression.Young people do dress all identical though. You used to be able to tell who was cool and had decent music taste and who to avoid by their tribal allegiance. Now the boys all wear NICCE tops and the girls all wear leggings and vans. I'd never have survived navigating my teens without the visual cues of fashion and culture.